Welding electrode holder



May p E945 c. F. CARLSON ETAL, l 29374-9979 WELDING ELECTRQDE HOLDER Filed March 18, 1943 Patented May 1,1945 ,I I f y UNITED STATES .PATENT orifice WELDING ELECTBODE HOLDER Chester F. Carlson, Jackson Heights, N. Y., and Edman F. Holt and Robert F. Huddleston, Indianapolis. Ind., assignors to P. R. Mallory & Co., Inc., Indianapolis, Ind., a corporation of Delaware Application March 18, 1943, Serial No. 479,618 Claims. (Cl. 21S-4) This invention relates welding electrode holdoutlet passages. Then, by striking the plunger,

ers-for resistance welding. suicient hydrostatic pressure is applied'to the Anobiect of the invention istoimprove eiectorwater within the holder to elect the electrode. type welding electrode holders. The invention is especially useful for holders of Other objects of the invention will be apparent 5 odd shapes or odd geometric design. It may also from the description and cla be employed within the welding arm itself in cer- In the drawing: tain Welders. Figures 1, 2 and 3 show three diii'erent modiii- Referring to the drawing, Figure 1 shows a barcations of welding electrode-holders embodying rel type holder I 0 having a hollow interior II endfeatures ofthe present invention, ing in a tapered socket I2 in which is iitted a Resistance welding electrodes are usually supwelding electrode I3 having a tapered outer surliquig to the inside ofthe electrode. The elecclamped inan lmbf aWelding machintrodes are usually tapered to t into'a tapered 15 A water inlet valve I6 and water outlet valve I1- socket in thev electrode holder and the holder is 1 are screwed into the wall of the holder near-its provided with a water supply tube extending into rear end, the valve passage communicating with f a recess in the electrode to carry the cooling the hollow' interior of the holder.

`waterinto the electrode. The hollow interior is of somewhat 'larger di- `It frequently becomes necessary to remove thel ameter near its rear end and a plunger I8 is iitted welding electrodes to replace them when they wear to Slide therein. Plunger I8 has a projecting out or become deformed, or to substitute dierend I8 which extends out of the rear end of the ent electrodes for different types of work. Since holder. A packing ring is compressed around vent water leakage, the remova1 of the electrodes the plunger cooperates with washer 22 to limit the is often quite dimeuit. In the past, the electrodes outward travel of the plunger.

have usually been removed by using a wrench` or The mid-portion of the plunger iB has a transsimilar tool. More recently, ejector-type welding 3o verse bore 23 formed therein and a communicatelectrode holders have been developed such as the ing axial bore 24 extending toward the welding so that the electrode can be removed by driving 435 'around the plunger at this point. During normal vthe plug against the inner end of the welding operation, passage 23issubstantial1y aligned with electrode to' eject it. A similar arrangement has the Water passage 0f Valve |6- been applied to electrode holders having a long, A water supply tube 25 is threaded into the passtraight berre1 1n which cese the ejector member Sago 24 at the inner oud of the plunger and has COIIADI'lsesy a long tubular sleeve extending for 40 8 telesoping tube portion 26 which can be ex` nearly the entire length of the barrel between the tended to project into recess l5 of the electrode.

, barrel wall and the central cooling water supply A Second Packing ring 21 surrounds the Plungtu er I8 between valves I8 and I'I to prevent bypass This has the objection .that theeejector sleeve of water from the inlet to thel outlet. A sleeve obstructs the water passage so as to seriously de 28 of metal or rubber having a perforated extenor'oiT-set portion. l integral with the plunger, or i! end I9 is of sum- A feature of the present invention resides in the cient length it may be eliminated use of the water contained within the electrode When the holder is in use, valves I8 and il are accomplished by providing a piston or plunger at turnhoses respectively so that circulating water to. the hollow interior Il of l thereby applying hydrostatic ter -withinthe passages todrive out thewelding electrode. If desired,

a cloth orcontainer i .small internal water supply end section 33 of rubberl or other flexible material tube 42 has a section 'invention broadly within the spirit piston member.A to

where it absorbs heat and returns around the outside of tube to water outlet valve Il.

Should it be desired to remove electrode I3, it is only necessary torclose valves I6 and I1 by turning the handles and 3l to "closed position. The electrode -may then be removed by striking the projecting end I9 of the plunger pressure to the wa- Vof the holder suiiicient may be placed over the end holder to catch the electrode with some of the water from of the electrode and as it is ejected along the holder.

- Figure 2 shows a modification comprising a holder 32 having an electrode 34 therein.

tube 35 mayy have an to permit conveying the water .suppl'yaround the bends in the passageway 31 of the holder.

A plunger return spring 38 is provided between the inner end of the plunger and a sleeve 3l (which rests against a shoulder inside the holder) to return the plunger to its rearward position after an electrode has been ejected.

Figure 3 shows prising a holder 40 having its end curved to support electrode 4l at right angles to the main body of the holder.

43 of ilexible rubber or metal to convey the water around the bend in the holder. The arrangement of plunger I3 and the water passageare otherwise similar to Figure l.' Perforated extension M is integralwith the plunger and limits the inward travel of the plunger by coming in contact with the shoulder in the bore.

The present invention provides an ejector type welding electrode holder of simpler and more economical construction than those used heretothe welding electrode.

- projecting oil-set end 33 holding an In this modiiication, the

assi-aoray n houow interior or said holder, liquid met and outlet conduits extending through the wall of said'body into the hollow interior thereof, valves for closing said conduits. and a plunger extending' through said wall for applying hydrostatic pressure to liquid in saidj hollow interior for ejecting said electrode without direct engagement therewith by striking or applying pressure to the external end of said plunger.

3. 'A welding electrode holder comprising a tubular body, the hollow interior thereof extending throughout its length and terminating at one end in a tapered socket for receiving a weldingl electrode, a plunger closing the other'end of said hollow interior with Aone lend thereof normally out of the end of said body,

being capable of varying the volume by longitudinal movement,

er thereby of said hollow interior liquid inlet and outlet conduits leading into the hollow interior of said body and valves for closing said conduits, said plunger being free of any dia further modification com-` The interior water supply.

35 hollow interior fore since an ejector sleeve within the holder is' the holder by removal of obstructions in the water passage. The ejector feature is also applicable to holders of odd shapes where a sleeve type ejector could not be used.

While speciiic embodiments of the invention have been described, it-is intended to cover the and scopethe appended claims.

What is claimed is:

1. A welding electrode low body, a socket therein for receiving a welding electrode, liquid inlet communicatingwith the hollow interior of said holder comprising ia holnot required. The elimination ofthe sleeve likewise increases the Vwater carryingcapacity of and outlet conduits body, valves for"`closing said conduits, a piston member for' changing the volume of said hollow interior, and external means` for moving said dislodge said electrode solely by`hydraulic pressurel f 2. A welding electrode 'holder comprising a hol.. low body, a socket therein for receiving a welding electrode, s'aid s 65. ket vcommunicating with -the end in a tapered socket for receiving said body, when rect mechanical driving connection with said electrode but being capable of ejecting said electrode by applying hydrostatic pressure to liquid iilling said hollow interior when said valves are closed and an extreme force 4. A welding electrode holder comprising a tubular body, the hollow interior thereof extending throughout its length and terminating at one end in a tapered socket for receiving a welding electrode, a' plunger closing the other end of said/hollow interior with one end thereof normally projecting out of the end of said body, liquid inlet and outlet conduits leading into the of said body, and a spring compressible by the inward movement of said plunger for returning said plunger to normal position after it has been moved into said body, whereby ejection of a welding electrode from said socket said holder is lled with Il gud.

5. A welding electrode holder comprising a tubular body, the hollow interior thereof extending throughout its length and terminating at one a welding electrode, a plunger closing .the other end of said hollow interior with one end thereofnormally projecting out ofthe end of said body, liquid inlet and outlet conduits leading into the hollow interior-of said body, valves in said conduits, and

a spring compress'lble by the inward movement of said plunger fox-returning said plunger to normal position-after it has been moved into said body, a iluid sealing ring around said plunger and shoulders on said body and outward travel of saidplunger, said plunger being f reeof any direct mechanical driving connection` with said electrode but being capable o'f ejecting said force applied thereto by applying hydrostatic pressure to liquid said valves are closed.

CHESTER canals-0N. EDMAN F. Hour. Rossi-rr marmo TON.

said plungis applied to said plunger.

be effected by depressing said.plunger whentollimit the inward electrode responsive to external lling the hollowfinterior of 

